Swab-valve mechanism.



A. F. HUMPHREY L H. F. BEAM.

SWAB VALVE MECHANISM.

APPucATloN man ocT. 2s, 1914.

Patented Mar. 28, 1916.

A TTOHNEY UNTED STATES ATET OFFICE.

ALEXANDER FOSTER HUMPHREY, 0F PITTSBURGH. AND HOWARD F. BEAM, OF HARBIONY, PENNSYLVANIA, ASSIGNORS 0F ONE-THIRD TO SAMUEL A. BEAM,

0F HARMONY, PENNSYLVANIA.

SWAB-VALVE MECHANISM.

Application led October 2S, 1914.

To ZZ "whom it may concern.'

Be it known that we, ALEXANDER Fosrnn HUMrHRnY and HowAnn F. BEAM, citizens of the United States of America, residing respectively, at Pittsburgh and Harmony, 1n the counties of Allegheny and Butler and State of hrnnsylvania, have. invented certain new and useful Improvements in Swah- Valve Mechanism, of which the following .is a specification, reference being had therein to the accompanying drawing.

This invention relates to valve mechanism, designated primarily for the employment in swabbing devices for oil wells, although it can be employed for any purposes wherein it is found applicable, and has for its object to provide a mechanism of such class, in a manner as hereinafter set forth, with means to relieve the pressure fluid upon the valve clement of the device when the pressure cxceeds a predetermined point.

Further objects of the invention are to provide a valve mechanism for the purpose set forth, which is simple in its construction and arrangement, strong, durable, adjustable, eflicient and convenient in its use, readily set up and comparatively inexpensive to manufacture.

lVith the foregoing and other objects in view the invention consists of a novel construction, combination and arrangement of parts as hereinafter more specifically dcscribed and illustrated in the accompanying drawings wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views Figure 1 is a vertical sectional view of a valve mechanism in accordance with this invention, the valve clement of the mechanism being seated. Fig. 2 -is a top plate of a valve cage. Fig. 3 is a plan view of the adjusting element for the resilient support of the valve piston. Fig. 'i is a top plan view, broken away, of a valve piston. Fig. 5 is an elevation of a modified form of valvular clement.

Referring to the drawings in detail 1 denotes a casing', having its inner face at the lower end thereof provided with threads 2, its upper end contracted as at 3 and. ter- Speccation of Letters Patent.

Patented Mar. 28, 1916.

seriai No. 365,628.

minating in a peripherally threaded neck 4 which is adapted to be secured to a swabbin device or any other device for which the valve mechanism is used.

The reference character 5 denotes a body portion of the valve mechanism, which is cylindrical in contour and open at each end. The lower part of the body portion 5 is of greater thickness than the upper part, as indicated at ti and said thickened portion is formed with an outwardly projectingT annular flange 'I and further provided with peripheral threads h. The body portion 5 in proximity to the thickened part (i is formed with a series of spaced openings 9. The body portion 53 extends in a casing 1 and the peripheral threads S thereof engage with the interior threads 2 of the casing il whereby the latter is connected to the body portion Verticali); movable within the body portion 5 is a hollow valve piston 10. which is cylindrical inv contour and has its lower end provided with an inwardly extending Hange 1,1 and its upper end with a head 12, having a centrali)Y disposed opening 13, havingr its wall beveled as at il, to prov-ide a valve seat for a valvular clement 1T, the latter beingr globular in contour.

Arranged within the body portion 5 and abutting against the flange 11. is an expansible and contractibh` coil spring 1G, which constitutes a resilient support for the valve piston 10 and which further maintains the valve piston l() at the upper end ofthe bodv portion To arrcst upward movement of the valve piston 10. a ilange `cap 17 is connected to .said upper end of the body portion 5 and said cap 1T has a centrally disposed opening 1S. A\rranged in the body portion 5 at the lower end thereof, as well as having threaded engagement therewith, is an adjusting member lf). for increasing or decreasing the tension of the spring 1G.

The valve piston 10 is provided with a series of spaced openings 20, which when said piston is shifted downward. are adapted to register with the openings 9.

The adjusting member 19 is hollow and forms an inlet 21. to thev valve body 5. The opening 13 in the head 12 constitutes an outlet for the valve body 5.

Carried b v the head 12 of the valve piston 10, is a cage for the Yalvnlar element 15, and said cage consists of a plurality of vertically disposed rods 22, fixedly secured to the head 12, and having attached thereto a top plate 23, formed with an opening 24.

,i Under ordinary*workingconditions Huid will pass up through the adjusting member 19, valve piston 10, `opening 13, and out through the neck l of the casing 1, but if the pressure above the valve element 13, would exceed thc tension to which the spring 16 is set, the valve piston 10 would be lowered, so that the opening 20 will register with the opening 9, and the fluid would pass through said registering openings, through the valve body and down through the member 19.

In Fig. 5 of the drawings a modified -fform of valvular element isillustrated, which consists of a conical-valve head 25, having a stem 9.6, which projects through the top plate 23 of vthe valve cage, and interposed between the top plate 23, and the valve head '25 and surrounding the stern 26 is a coil spring 27. The spring 27 normally maintains the valve head in engagement with its seat.

The Weight of the globular element 15 is such. as to normally maintain it against its seat.

It may not be desirable to employ the casing l and under such conditions the valve 30 body 5 can be connected. by its peripheral threads 8, with the swaboing device or any other device with which the valve mechanism is employed.

To prevent the valve piston l0 from revolving upon a vertical axis. said piston is formed with a lug 29, which extends in a vertical groove 30 formed in the inner face of the thin part of the bodyportion 5 and by the employment of the lug 29 in the groove the openings 20 will be caused to register with the openings 9 when the valve piston 10 is shifted downward.

l/Vhat we claim is l1. A device of the class described comprising a hollow body portion formed with openings, a hollow spring controlled valve piston having openings capable of registering with the openings in said bodv portion. said valve piston further provided with an opening at one end and having the wall thereof constituting a valve seat, a valvular element normally engaging said seat to close the opening, and a cage for said valvular element supported by said valve piston, that part of said body portion having the openings of less thickness than the remaining portion.

2, A device oi the class described comprising a hollow body portion formed with openings, a. hollow spring controlled valve piston having openings capable of registering with the openings 1n saidbody portion,A

said valve piston further provided with an opening at one end and having the wall thereof constituting a valve seat, a valvular -element normally engaging said seat to close prising a hollow body portion formed with openings, a hollow spring controlled valve piston having openings capable of registering with the openings in said body portion, said valve piston further provided with an opening at one end and having the wall thereof constituting a valve seat, a valvular element normally engaging said seat to close the opening, and a cage for said valvular element supported by said valve piston, that part of said body portion having the openings of less thickness than the remaining portion, and av casing having-said body portion extending therein and further connected to the thickened part of said body portion.

4. A device of the class described comprising a'hollow body portion formed with open,- ings. a hollow springcontrolled valve piston having openings capable of registering with the openings in said body portion, said valve piston further-'provided with an opening at one end and having the wall thereof constituting,a valve seat, a valvular element normally engagingY said seat to close the opening, and a rage for said valvular clement supported by said valve piston, and a resilient support for said valve piston, said support arranged within said body portion, and means.connected with the body portion for adjusting the tension of said support, that part oi said body portion provided with the opening of less thickness than the remaining portion, and a casing having said body portion extending therein and further connected to the thickened part of said body' portion.

In testimony whereof we atliX our signatures in the presence of two witnesses.

ALEXANDER FOSTER HUMPHREY. HWRD F'. BEAM.

Witnesses:

MAX H. Snonovrrz. MARIE H. ZLnenA. 

